FIBR: A Systems Approach to Study Redox Regulation of Functions of Photosynthetic Organisms

FIBR：研究光合生物功能氧化还原调节的系统方法

• 批准号: 0425749
• 负责人: Himadri Pakrasi
• 金额: $ 493.07万
• 依托单位: Washington University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-09-01 至 2011-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0425749&HistoricalAwards=false
• 关键词: FIBR; Systems; Approach; Study; Redox

Redox homeostasis is central to the functions of oxygenic photosynthetic organismssuch as cyanobacteria and plants. In this project, a systems approach will beundertaken to analyze the impact of cellular redox status on the overall functions ofthese organisms. The initial focus will be on the cyanobacterium Synechocystis 6803,with subsequent applications in the understanding of the biology of Arabidopsis, avascular plant, and Physcomitrella, a non-vascular plant. Synechocystis 6803 has acompletely sequenced genome and is amenable to high-throughput genome levelmanipulations. Although the detailed inventory of the genes, transcripts and proteins areavailable for Synechocystis, it is inadequate to comprehend the organizational hierarchyof the complex functions of this organism. A multidisciplinary approach will be used toresolve this gap in fundamental knowledge. The expertise of the project team spansmolecular genetics, biochemistry, proteomics, metabolomics, computational biology andsystems engineering, which includes nonlinear modeling, estimation and statisticalanalysis. The experimental research experience of the team spans model systems incyanobacteria, moss and flowering plants. One aim is to infer a gene regulatory networkin cyanobacteria that will include identification of the sensing and signaling pathways. Inaddition, a gene regulatory network will be independently generated in Arabidopsis, andthe conservation of the genes and interactions will be evaluated. The network will bevalidated, the contribution of the network modules to the overall redox regulation will bestudied, and the model will be extended to Physcomitrella. Such an iterative process isexpected to generate fundamental insights into the organization and function of theredox control network (RCN) in these organisms. Furthermore, the proposed approach,viz. first to model an RCN in cyanobacteria and then to extend it to plants, will highlightthe expected conserved nature of these processes during the evolution of land plants.Broad Impact: The research activities in this project will be intimately connected to thetraining and development of undergraduate, graduate and post-doctoral students, andvisiting scholars, both at Washington University and Colgate University. In particular,students from both Biology and Systems Engineering will become well-versed in the useof mathematics and computational methods to answer challenging questions in biology.Collaborative interactions with Saitama University will allow scientific interactions andresearch visits between USA and Japan. An important goal of this project is anintegration of cutting-edge technologies with learning experiences that will inspire facultyand student development from small colleges lacking significant research programs.The students will obtain mentoring, research credit and training. They will becomeaware of the fascinating array of activities and career choices in modern life scienceresearch. Hands-on training in genomics, bioinformatics and systems science researchwill have far-reaching educational impacts well beyond the project period.The link for the project web site is http://www.sysbio.wustl.edu/.

氧化还原动态平衡是蓝藻和植物等产氧光合作用生物功能的核心。在这个项目中，将采用系统的方法来分析细胞氧化还原状态对这些生物体整体功能的影响。最初的重点将放在蓝藻聚胞藻6803上，随后将应用于了解拟南芥、无维管植物和无维管植物商陆的生物学。聚球藻6803具有完整的基因组序列，能够进行高通量的基因组水平操作。虽然聚球藻的基因、转录本和蛋白质的详细清单是可用的，但还不足以理解这种有机体复杂功能的组织等级。将使用多学科方法来解决基础知识方面的这一差距。项目团队的专业知识涵盖分子遗传学、生物化学、蛋白质组学、代谢组学、计算生物学和系统工程，其中包括非线性建模、估计和统计分析。该团队的实验研究经验跨越蓝藻、苔藓和开花植物的模型系统。一个目标是推断蓝藻中的基因调控网络，其中将包括识别传感和信号通路。此外，将在拟南芥中独立生成一个基因调控网络，并对基因及其相互作用的保守性进行评估。将对网络进行验证，研究网络模块对整体氧化还原调节的贡献，并将模型扩展到Physcomitrella。这样的迭代过程有望产生对这些生物体中还原控制网络(RCN)的组织和功能的基本见解。此外，提出的方法，即。首先在蓝藻中建立RCN模型，然后将其扩展到植物中，将突出这些过程在陆地植物进化过程中预期的保守性质。广泛影响：该项目的研究活动将与华盛顿大学和高露洁大学的本科生、研究生和博士后以及访问学者的培养和发展密切相关。特别是，生物学和系统工程专业的学生将精通使用数学和计算方法回答生物学中具有挑战性的问题。与崎玉大学的合作互动将使美国和日本之间的科学互动和研究访问成为可能。该项目的一个重要目标是将尖端技术与学习经验相结合，以激励缺乏重大研究项目的小型学院的教师和学生的发展。学生将获得指导、研究学分和培训。他们将意识到现代生命科学研究中一系列引人入胜的活动和职业选择。基因组学、生物信息学和系统科学研究方面的实践培训将在项目期间产生深远的教育影响。该项目网站的链接是http://www.sysbio.wustl.edu/.